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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.1 by root, Fri Feb 3 19:49:32 2006 UTC vs.
Revision 1.230 by root, Mon Apr 2 18:04:46 2007 UTC

1package cf; 1package cf;
2
3use utf8;
4use strict;
2 5
3use Symbol; 6use Symbol;
4use List::Util; 7use List::Util;
8use Storable;
9use Event;
10use Opcode;
11use Safe;
12use Safe::Hole;
5 13
6use strict; 14use Coro 3.52 ();
15use Coro::State;
16use Coro::Event;
17use Coro::Timer;
18use Coro::Signal;
19use Coro::Semaphore;
20use Coro::AIO;
7 21
8our %COMMAND; 22use BDB ();
23use Data::Dumper;
24use Digest::MD5;
25use Fcntl;
26use YAML::Syck ();
27use IO::AIO 2.32 ();
28use Time::HiRes;
29use Compress::LZF;
30
31# configure various modules to our taste
32#
33Coro::State::cctx_stacksize 256000; # 1-2MB stack, for deep recursions in maze generator
34Compress::LZF::sfreeze_cr { }; # prime Compress::LZF so it does not use require later
35
36$Event::Eval = 1; # no idea why this is required, but it is
37
38# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
39$YAML::Syck::ImplicitUnicode = 1;
40
41$Coro::main->prio (Coro::PRIO_MAX); # run main coroutine ("the server") with very high priority
42
43sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
44
45our %COMMAND = ();
46our %COMMAND_TIME = ();
47
48our @EXTS = (); # list of extension package names
49our %EXTCMD = ();
50our %EXT_CORO = (); # coroutines bound to extensions
51our %EXT_MAP = (); # pluggable maps
52
53our $RELOAD; # number of reloads so far
9our @EVENT; 54our @EVENT;
10our %PROP_TYPE; 55our $LIBDIR = datadir . "/ext";
11our %PROP_IDX; 56
57our $TICK = MAX_TIME * 1e-6;
58our $TICK_WATCHER;
59our $AIO_POLL_WATCHER;
60our $NEXT_RUNTIME_WRITE; # when should the runtime file be written
61our $NEXT_TICK;
62our $NOW;
63our $USE_FSYNC = 1; # use fsync to write maps - default off
64
65our $BDB_POLL_WATCHER;
66our $DB_ENV;
67
68our %CFG;
69
70our $UPTIME; $UPTIME ||= time;
71our $RUNTIME;
72
73our %PLAYER; # all users
74our %MAP; # all maps
75our $LINK_MAP; # the special {link} map, which is always available
76our $RANDOM_MAPS = cf::localdir . "/random";
77our $BDB_ENV_DIR = cf::localdir . "/db";
78
79our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal;
80our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal;
81
82# used to convert map paths into valid unix filenames by replacing / by ∕
83our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons
84
85binmode STDOUT;
86binmode STDERR;
87
88# read virtual server time, if available
89unless ($RUNTIME || !-e cf::localdir . "/runtime") {
90 open my $fh, "<", cf::localdir . "/runtime"
91 or die "unable to read runtime file: $!";
92 $RUNTIME = <$fh> + 0.;
93}
94
95mkdir cf::localdir;
96mkdir cf::localdir . "/" . cf::playerdir;
97mkdir cf::localdir . "/" . cf::tmpdir;
98mkdir cf::localdir . "/" . cf::uniquedir;
99mkdir $RANDOM_MAPS;
100mkdir $BDB_ENV_DIR;
101
102our $EMERGENCY_POSITION;
103
104sub cf::map::normalise;
105
106#############################################################################
107
108=head2 GLOBAL VARIABLES
109
110=over 4
111
112=item $cf::UPTIME
113
114The timestamp of the server start (so not actually an uptime).
115
116=item $cf::RUNTIME
117
118The time this server has run, starts at 0 and is increased by $cf::TICK on
119every server tick.
120
121=item $cf::LIBDIR
122
123The perl library directory, where extensions and cf-specific modules can
124be found. It will be added to C<@INC> automatically.
125
126=item $cf::NOW
127
128The time of the last (current) server tick.
129
130=item $cf::TICK
131
132The interval between server ticks, in seconds.
133
134=item %cf::CFG
135
136Configuration for the server, loaded from C</etc/crossfire/config>, or
137from wherever your confdir points to.
138
139=item $cf::WAIT_FOR_TICK, $cf::WAIT_FOR_TICK_ONE
140
141These are Coro::Signal objects that are C<< ->broadcast >> (WAIT_FOR_TICK)
142or C<< ->send >> (WAIT_FOR_TICK_ONE) on after normal server tick
143processing has been done. Call C<< ->wait >> on them to maximise the
144window of cpu time available, or simply to synchronise to the server tick.
145
146=back
147
148=cut
12 149
13BEGIN { 150BEGIN {
14 @EVENT = map lc, @EVENT;
15
16 *CORE::GLOBAL::warn = sub { 151 *CORE::GLOBAL::warn = sub {
17 my $msg = join "", @_; 152 my $msg = join "", @_;
153 utf8::encode $msg;
154
18 $msg .= "\n" 155 $msg .= "\n"
19 unless $msg =~ /\n$/; 156 unless $msg =~ /\n$/;
20 157
21 print STDERR "cfperl: $msg";
22 LOG llevError, "cfperl: $msg"; 158 LOG llevError, $msg;
23 }; 159 };
24} 160}
25 161
26# generate property mutators 162@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
27sub prop_gen { 163@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
28 my ($prefix, $class) = @_; 164@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
165@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
166@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
167@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
29 168
169# we bless all objects into (empty) derived classes to force a method lookup
170# within the Safe compartment.
171for my $pkg (qw(
172 cf::global cf::attachable
173 cf::object cf::object::player
174 cf::client cf::player
175 cf::arch cf::living
176 cf::map cf::party cf::region
177)) {
30 no strict 'refs'; 178 no strict 'refs';
179 @{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
180}
31 181
32 for my $prop (keys %PROP_TYPE) { 182$Event::DIED = sub {
33 $prop =~ /^\Q$prefix\E_(.*$)/ or next; 183 warn "error in event callback: @_";
34 my $sub = lc $1; 184};
35 185
36 my $type = $PROP_TYPE{$prop}; 186=head2 UTILITY FUNCTIONS
37 my $idx = $PROP_IDX {$prop};
38 187
39 *{"$class\::get_$sub"} = *{"$class\::$sub"} = sub { 188=over 4
40 $_[0]->get_property ($type, $idx) 189
190=item dumpval $ref
191
192=cut
193
194sub dumpval {
195 eval {
196 local $SIG{__DIE__};
197 my $d;
198 if (1) {
199 $d = new Data::Dumper([$_[0]], ["*var"]);
200 $d->Terse(1);
201 $d->Indent(2);
202 $d->Quotekeys(0);
203 $d->Useqq(1);
204 #$d->Bless(...);
205 $d->Seen($_[1]) if @_ > 1;
206 $d = $d->Dump();
41 }; 207 }
208 $d =~ s/([\x00-\x07\x09\x0b\x0c\x0e-\x1f])/sprintf "\\x%02x", ord($1)/ge;
209 $d
210 } || "[unable to dump $_[0]: '$@']";
211}
42 212
43 *{"$class\::set_$sub"} = sub { 213use JSON::XS qw(to_json from_json); # TODO# replace by JSON::PC once working
44 $_[0]->set_property ($type, $idx, $_[1]); 214
215=item $ref = cf::from_json $json
216
217Converts a JSON string into the corresponding perl data structure.
218
219=item $json = cf::to_json $ref
220
221Converts a perl data structure into its JSON representation.
222
223=item cf::lock_wait $string
224
225Wait until the given lock is available. See cf::lock_acquire.
226
227=item my $lock = cf::lock_acquire $string
228
229Wait until the given lock is available and then acquires it and returns
230a Coro::guard object. If the guard object gets destroyed (goes out of scope,
231for example when the coroutine gets canceled), the lock is automatically
232returned.
233
234Lock names should begin with a unique identifier (for example, cf::map::find
235uses map_find and cf::map::load uses map_load).
236
237=cut
238
239our %LOCK;
240
241sub lock_wait($) {
242 my ($key) = @_;
243
244 # wait for lock, if any
245 while ($LOCK{$key}) {
246 push @{ $LOCK{$key} }, $Coro::current;
247 Coro::schedule;
248 }
249}
250
251sub lock_acquire($) {
252 my ($key) = @_;
253
254 # wait, to be sure we are not locked
255 lock_wait $key;
256
257 $LOCK{$key} = [];
258
259 Coro::guard {
260 # wake up all waiters, to be on the safe side
261 $_->ready for @{ delete $LOCK{$key} };
262 }
263}
264
265sub freeze_mainloop {
266 return unless $TICK_WATCHER->is_active;
267
268 my $guard = Coro::guard {
269 $TICK_WATCHER->start;
270 };
271 $TICK_WATCHER->stop;
272 $guard
273}
274
275=item cf::async { BLOCK }
276
277Currently the same as Coro::async_pool, meaning you cannot use
278C<on_destroy>, C<join> or other gimmicks on these coroutines. The only
279thing you are allowed to do is call C<prio> on it.
280
281=cut
282
283BEGIN { *async = \&Coro::async_pool }
284
285=item cf::sync_job { BLOCK }
286
287The design of crossfire+ requires that the main coro ($Coro::main) is
288always able to handle events or runnable, as crossfire+ is only partly
289reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
290
291If it must be done, put the blocking parts into C<sync_job>. This will run
292the given BLOCK in another coroutine while waiting for the result. The
293server will be frozen during this time, so the block should either finish
294fast or be very important.
295
296=cut
297
298sub sync_job(&) {
299 my ($job) = @_;
300
301 if ($Coro::current == $Coro::main) {
302 # this is the main coro, too bad, we have to block
303 # till the operation succeeds, freezing the server :/
304
305 # TODO: use suspend/resume instead
306 # (but this is cancel-safe)
307 my $freeze_guard = freeze_mainloop;
308
309 my $busy = 1;
310 my @res;
311
312 (async {
313 @res = eval { $job->() };
314 warn $@ if $@;
315 undef $busy;
316 })->prio (Coro::PRIO_MAX);
317
318 while ($busy) {
319 Coro::cede or Event::one_event;
45 }; 320 }
321
322 wantarray ? @res : $res[0]
323 } else {
324 # we are in another coroutine, how wonderful, everything just works
325
326 $job->()
327 }
328}
329
330=item $coro = cf::async_ext { BLOCK }
331
332Like async, but this coro is automatically being canceled when the
333extension calling this is being unloaded.
334
335=cut
336
337sub async_ext(&) {
338 my $cb = shift;
339
340 my $coro = &Coro::async ($cb);
341
342 $coro->on_destroy (sub {
343 delete $EXT_CORO{$coro+0};
46 } 344 });
47} 345 $EXT_CORO{$coro+0} = $coro;
48 346
49# auto-generate most of the API 347 $coro
348}
50 349
51prop_gen OBJECT_PROP => "cf::object"; 350sub write_runtime {
52# CFAPI_OBJECT_ANIMATION? 351 my $guard = cf::lock_acquire "write_runtime";
53prop_gen PLAYER_PROP => "cf::object::player";
54 352
55prop_gen MAP_PROP => "cf::map"; 353 my $runtime = cf::localdir . "/runtime";
56prop_gen ARCH_PROP => "cf::arch";
57 354
58# guessed hierarchies 355 my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
59
60@cf::object::player::ISA = 'cf::object';
61@cf::object::map::ISA = 'cf::object';
62
63my @exts;
64my @hook;
65my %command;
66
67sub inject_event {
68 my ($data) = @_;
69
70 my $cb = $hook[$data->{event_code}]
71 or return; 356 or return;
72 357
73 $_->($data) for values %$cb; 358 my $value = $cf::RUNTIME + 90 + 10;
359 # 10 is the runtime save interval, for a monotonic clock
360 # 60 allows for the watchdog to kill the server.
74 361
75 () 362 (aio_write $fh, 0, (length $value), $value, 0) <= 0
76} 363 and return;
77 364
78sub inject_command { 365 # always fsync - this file is important
79 my ($name, $obj, $params) = @_; 366 aio_fsync $fh
367 and return;
80 368
81 for my $cmd (@{ $command{$name} }) { 369 close $fh
82 $cmd->[1]->($obj, $params); 370 or return;
83 }
84 371
372 aio_rename "$runtime~", $runtime
373 and return;
374
85 -1 375 1
86} 376}
377
378=item cf::datalog type => key => value, ...
379
380Log a datalog packet of the given type with the given key-value pairs.
381
382=cut
383
384sub datalog($@) {
385 my ($type, %kv) = @_;
386 warn "DATALOG ", JSON::XS->new->ascii->encode ({ %kv, type => $type });
387}
388
389=back
390
391=cut
392
393#############################################################################
394
395=head2 ATTACHABLE OBJECTS
396
397Many objects in crossfire are so-called attachable objects. That means you can
398attach callbacks/event handlers (a collection of which is called an "attachment")
399to it. All such attachable objects support the following methods.
400
401In the following description, CLASS can be any of C<global>, C<object>
402C<player>, C<client> or C<map> (i.e. the attachable objects in
403crossfire+).
404
405=over 4
406
407=item $attachable->attach ($attachment, key => $value...)
408
409=item $attachable->detach ($attachment)
410
411Attach/detach a pre-registered attachment to a specific object and give it
412the specified key/value pairs as arguments.
413
414Example, attach a minesweeper attachment to the given object, making it a
41510x10 minesweeper game:
416
417 $obj->attach (minesweeper => width => 10, height => 10);
418
419=item $bool = $attachable->attached ($name)
420
421Checks wether the named attachment is currently attached to the object.
422
423=item cf::CLASS->attach ...
424
425=item cf::CLASS->detach ...
426
427Define an anonymous attachment and attach it to all objects of the given
428CLASS. See the next function for an explanation of its arguments.
429
430You can attach to global events by using the C<cf::global> class.
431
432Example, log all player logins:
433
434 cf::player->attach (
435 on_login => sub {
436 my ($pl) = @_;
437 ...
438 },
439 );
440
441Example, attach to the jeweler skill:
442
443 cf::object->attach (
444 type => cf::SKILL,
445 subtype => cf::SK_JEWELER,
446 on_use_skill => sub {
447 my ($sk, $ob, $part, $dir, $msg) = @_;
448 ...
449 },
450 );
451
452=item cf::CLASS::attachment $name, ...
453
454Register an attachment by C<$name> through which attachable objects of the
455given CLASS can refer to this attachment.
456
457Some classes such as crossfire maps and objects can specify attachments
458that are attached at load/instantiate time, thus the need for a name.
459
460These calls expect any number of the following handler/hook descriptions:
461
462=over 4
463
464=item prio => $number
465
466Set the priority for all following handlers/hooks (unless overwritten
467by another C<prio> setting). Lower priority handlers get executed
468earlier. The default priority is C<0>, and many built-in handlers are
469registered at priority C<-1000>, so lower priorities should not be used
470unless you know what you are doing.
471
472=item type => $type
473
474(Only for C<< cf::object->attach >> calls), limits the attachment to the
475given type of objects only (the additional parameter C<subtype> can be
476used to further limit to the given subtype).
477
478=item on_I<event> => \&cb
479
480Call the given code reference whenever the named event happens (event is
481something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
482handlers are recognised generally depends on the type of object these
483handlers attach to).
484
485See F<include/eventinc.h> for the full list of events supported, and their
486class.
487
488=item package => package::
489
490Look for sub functions of the name C<< on_I<event> >> in the given
491package and register them. Only handlers for eevents supported by the
492object/class are recognised.
493
494=back
495
496Example, define an attachment called "sockpuppet" that calls the given
497event handler when a monster attacks:
498
499 cf::object::attachment sockpuppet =>
500 on_skill_attack => sub {
501 my ($self, $victim) = @_;
502 ...
503 }
504 }
505
506=item $attachable->valid
507
508Just because you have a perl object does not mean that the corresponding
509C-level object still exists. If you try to access an object that has no
510valid C counterpart anymore you get an exception at runtime. This method
511can be used to test for existence of the C object part without causing an
512exception.
513
514=cut
515
516# the following variables are defined in .xs and must not be re-created
517our @CB_GLOBAL = (); # registry for all global events
518our @CB_ATTACHABLE = (); # registry for all attachables
519our @CB_OBJECT = (); # all objects (should not be used except in emergency)
520our @CB_PLAYER = ();
521our @CB_CLIENT = ();
522our @CB_TYPE = (); # registry for type (cf-object class) based events
523our @CB_MAP = ();
524
525my %attachment;
526
527sub cf::attachable::thawer_merge {
528 # simply override everything except _meta
529 local $_[0]{_meta};
530 %{$_[0]} = %{$_[1]};
531}
532
533sub _attach_cb($$$$) {
534 my ($registry, $event, $prio, $cb) = @_;
535
536 use sort 'stable';
537
538 $cb = [$prio, $cb];
539
540 @{$registry->[$event]} = sort
541 { $a->[0] cmp $b->[0] }
542 @{$registry->[$event] || []}, $cb;
543}
544
545# hack
546my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
547
548# attach handles attaching event callbacks
549# the only thing the caller has to do is pass the correct
550# registry (== where the callback attaches to).
551sub _attach {
552 my ($registry, $klass, @arg) = @_;
553
554 my $object_type;
555 my $prio = 0;
556 my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
557
558 #TODO: get rid of this hack
559 if ($attachable_klass{$klass}) {
560 %cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
561 }
562
563 while (@arg) {
564 my $type = shift @arg;
565
566 if ($type eq "prio") {
567 $prio = shift @arg;
568
569 } elsif ($type eq "type") {
570 $object_type = shift @arg;
571 $registry = $CB_TYPE[$object_type] ||= [];
572
573 } elsif ($type eq "subtype") {
574 defined $object_type or Carp::croak "subtype specified without type";
575 my $object_subtype = shift @arg;
576 $registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
577
578 } elsif ($type eq "package") {
579 my $pkg = shift @arg;
580
581 while (my ($name, $id) = each %cb_id) {
582 if (my $cb = $pkg->can ($name)) {
583 _attach_cb $registry, $id, $prio, $cb;
584 }
585 }
586
587 } elsif (exists $cb_id{$type}) {
588 _attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
589
590 } elsif (ref $type) {
591 warn "attaching objects not supported, ignoring.\n";
592
593 } else {
594 shift @arg;
595 warn "attach argument '$type' not supported, ignoring.\n";
596 }
597 }
598}
599
600sub _object_attach {
601 my ($obj, $name, %arg) = @_;
602
603 return if exists $obj->{_attachment}{$name};
604
605 if (my $attach = $attachment{$name}) {
606 my $registry = $obj->registry;
607
608 for (@$attach) {
609 my ($klass, @attach) = @$_;
610 _attach $registry, $klass, @attach;
611 }
612
613 $obj->{$name} = \%arg;
614 } else {
615 warn "object uses attachment '$name' that is not available, postponing.\n";
616 }
617
618 $obj->{_attachment}{$name} = undef;
619}
620
621sub cf::attachable::attach {
622 if (ref $_[0]) {
623 _object_attach @_;
624 } else {
625 _attach shift->_attach_registry, @_;
626 }
627};
628
629# all those should be optimised
630sub cf::attachable::detach {
631 my ($obj, $name) = @_;
632
633 if (ref $obj) {
634 delete $obj->{_attachment}{$name};
635 reattach ($obj);
636 } else {
637 Carp::croak "cannot, currently, detach class attachments";
638 }
639};
640
641sub cf::attachable::attached {
642 my ($obj, $name) = @_;
643
644 exists $obj->{_attachment}{$name}
645}
646
647for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
648 eval "#line " . __LINE__ . " 'cf.pm'
649 sub cf::\L$klass\E::_attach_registry {
650 (\\\@CB_$klass, KLASS_$klass)
651 }
652
653 sub cf::\L$klass\E::attachment {
654 my \$name = shift;
655
656 \$attachment{\$name} = [[KLASS_$klass, \@_]];
657 }
658 ";
659 die if $@;
660}
661
662our $override;
663our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
664
665sub override {
666 $override = 1;
667 @invoke_results = ();
668}
669
670sub do_invoke {
671 my $event = shift;
672 my $callbacks = shift;
673
674 @invoke_results = ();
675
676 local $override;
677
678 for (@$callbacks) {
679 eval { &{$_->[1]} };
680
681 if ($@) {
682 warn "$@";
683 warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
684 override;
685 }
686
687 return 1 if $override;
688 }
689
690 0
691}
692
693=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
694
695=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
696
697Generate an object-specific event with the given arguments.
698
699This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
700removed in future versions), and there is no public API to access override
701results (if you must, access C<@cf::invoke_results> directly).
702
703=back
704
705=cut
706
707#############################################################################
708# object support
709
710sub reattach {
711 # basically do the same as instantiate, without calling instantiate
712 my ($obj) = @_;
713
714 bless $obj, ref $obj; # re-bless in case extensions have been reloaded
715
716 my $registry = $obj->registry;
717
718 @$registry = ();
719
720 delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
721
722 for my $name (keys %{ $obj->{_attachment} || {} }) {
723 if (my $attach = $attachment{$name}) {
724 for (@$attach) {
725 my ($klass, @attach) = @$_;
726 _attach $registry, $klass, @attach;
727 }
728 } else {
729 warn "object uses attachment '$name' that is not available, postponing.\n";
730 }
731 }
732}
733
734cf::attachable->attach (
735 prio => -1000000,
736 on_instantiate => sub {
737 my ($obj, $data) = @_;
738
739 $data = from_json $data;
740
741 for (@$data) {
742 my ($name, $args) = @$_;
743
744 $obj->attach ($name, %{$args || {} });
745 }
746 },
747 on_reattach => \&reattach,
748 on_clone => sub {
749 my ($src, $dst) = @_;
750
751 @{$dst->registry} = @{$src->registry};
752
753 %$dst = %$src;
754
755 %{$dst->{_attachment}} = %{$src->{_attachment}}
756 if exists $src->{_attachment};
757 },
758);
759
760sub object_freezer_save {
761 my ($filename, $rdata, $objs) = @_;
762
763 sync_job {
764 if (length $$rdata) {
765 warn sprintf "saving %s (%d,%d)\n",
766 $filename, length $$rdata, scalar @$objs;
767
768 if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
769 chmod SAVE_MODE, $fh;
770 aio_write $fh, 0, (length $$rdata), $$rdata, 0;
771 aio_fsync $fh if $cf::USE_FSYNC;
772 close $fh;
773
774 if (@$objs) {
775 if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
776 chmod SAVE_MODE, $fh;
777 my $data = Storable::nfreeze { version => 1, objs => $objs };
778 aio_write $fh, 0, (length $data), $data, 0;
779 aio_fsync $fh if $cf::USE_FSYNC;
780 close $fh;
781 aio_rename "$filename.pst~", "$filename.pst";
782 }
783 } else {
784 aio_unlink "$filename.pst";
785 }
786
787 aio_rename "$filename~", $filename;
788 } else {
789 warn "FATAL: $filename~: $!\n";
790 }
791 } else {
792 aio_unlink $filename;
793 aio_unlink "$filename.pst";
794 }
795 }
796}
797
798sub object_freezer_as_string {
799 my ($rdata, $objs) = @_;
800
801 use Data::Dumper;
802
803 $$rdata . Dumper $objs
804}
805
806sub object_thawer_load {
807 my ($filename) = @_;
808
809 my ($data, $av);
810
811 (aio_load $filename, $data) >= 0
812 or return;
813
814 unless (aio_stat "$filename.pst") {
815 (aio_load "$filename.pst", $av) >= 0
816 or return;
817 $av = eval { (Storable::thaw $av)->{objs} };
818 }
819
820 warn sprintf "loading %s (%d)\n",
821 $filename, length $data, scalar @{$av || []};#d#
822 return ($data, $av);
823}
824
825#############################################################################
826# command handling &c
827
828=item cf::register_command $name => \&callback($ob,$args);
829
830Register a callback for execution when the client sends the user command
831$name.
832
833=cut
87 834
88sub register_command { 835sub register_command {
89 my ($name, $time, $cb) = @_; 836 my ($name, $cb) = @_;
90 837
91 my $caller = caller; 838 my $caller = caller;
839 #warn "registering command '$name/$time' to '$caller'";
92 840
93 push @{ $command{$name} }, [$time, $cb, $caller]; 841 push @{ $COMMAND{$name} }, [$caller, $cb];
94 $COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
95} 842}
843
844=item cf::register_extcmd $name => \&callback($pl,$packet);
845
846Register a callbackf ro execution when the client sends an extcmd packet.
847
848If the callback returns something, it is sent back as if reply was being
849called.
850
851=cut
852
853sub register_extcmd {
854 my ($name, $cb) = @_;
855
856 $EXTCMD{$name} = $cb;
857}
858
859cf::player->attach (
860 on_command => sub {
861 my ($pl, $name, $params) = @_;
862
863 my $cb = $COMMAND{$name}
864 or return;
865
866 for my $cmd (@$cb) {
867 $cmd->[1]->($pl->ob, $params);
868 }
869
870 cf::override;
871 },
872 on_extcmd => sub {
873 my ($pl, $buf) = @_;
874
875 my $msg = eval { from_json $buf };
876
877 if (ref $msg) {
878 if (my $cb = $EXTCMD{$msg->{msgtype}}) {
879 if (my %reply = $cb->($pl, $msg)) {
880 $pl->ext_reply ($msg->{msgid}, %reply);
881 }
882 }
883 } else {
884 warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
885 }
886
887 cf::override;
888 },
889);
96 890
97sub load_extension { 891sub load_extension {
98 my ($path) = @_; 892 my ($path) = @_;
99 893
100 $path =~ /([^\/\\]+)\.ext$/ or die "$path"; 894 $path =~ /([^\/\\]+)\.ext$/ or die "$path";
895 my $base = $1;
101 my $pkg = $1; 896 my $pkg = $1;
102 $pkg =~ s/[^[:word:]]/_/g; 897 $pkg =~ s/[^[:word:]]/_/g;
103 $pkg = "cf::ext::$pkg"; 898 $pkg = "ext::$pkg";
104 899
105 warn "loading '$path' into '$pkg'\n"; 900 warn "... loading '$path' into '$pkg'\n";
106 901
107 open my $fh, "<:utf8", $path 902 open my $fh, "<:utf8", $path
108 or die "$path: $!"; 903 or die "$path: $!";
109 904
110 my $source = 905 my $source =
111 "package $pkg; use strict; use utf8;\n" 906 "package $pkg; use strict; use utf8;\n"
112 . "#line 1 \"$path\"\n{\n" 907 . "#line 1 \"$path\"\n{\n"
113 . (do { local $/; <$fh> }) 908 . (do { local $/; <$fh> })
114 . "\n};\n1"; 909 . "\n};\n1";
115 910
116 eval $source 911 unless (eval $source) {
117 or die "$path: $@"; 912 my $msg = $@ ? "$path: $@\n"
913 : "extension disabled.\n";
914 if ($source =~ /^#!.*perl.*#.*MANDATORY/m) { # ugly match
915 warn $@;
916 warn "mandatory extension failed to load, exiting.\n";
917 exit 1;
918 }
919 die $@;
920 }
118 921
119 push @exts, $pkg; 922 push @EXTS, $pkg;
923}
120 924
925sub load_extensions {
926 for my $ext (<$LIBDIR/*.ext>) {
927 next unless -r $ext;
928 eval {
929 load_extension $ext;
930 1
931 } or warn "$ext not loaded: $@";
932 }
933}
934
935#############################################################################
936
937=head2 CORE EXTENSIONS
938
939Functions and methods that extend core crossfire objects.
940
941=cut
942
943package cf::player;
944
945use Coro::AIO;
946
947=head3 cf::player
948
949=over 4
950
951=item cf::player::find $login
952
953Returns the given player object, loading it if necessary (might block).
954
955=cut
956
957sub playerdir($) {
958 cf::localdir
959 . "/"
960 . cf::playerdir
961 . "/"
962 . (ref $_[0] ? $_[0]->ob->name : $_[0])
963}
964
965sub path($) {
966 my $login = ref $_[0] ? $_[0]->ob->name : $_[0];
967
968 (playerdir $login) . "/$login.pl"
969}
970
971sub find_active($) {
972 $cf::PLAYER{$_[0]}
973 and $cf::PLAYER{$_[0]}->active
974 and $cf::PLAYER{$_[0]}
975}
976
977sub exists($) {
978 my ($login) = @_;
979
980 $cf::PLAYER{$login}
981 or cf::sync_job { !aio_stat path $login }
982}
983
984sub find($) {
985 return $cf::PLAYER{$_[0]} || do {
986 my $login = $_[0];
987
988 my $guard = cf::lock_acquire "user_find:$login";
989
990 $cf::PLAYER{$_[0]} || do {
991 my $pl = load_pl path $login
992 or return;
993 $cf::PLAYER{$login} = $pl
994 }
995 }
996}
997
998sub save($) {
999 my ($pl) = @_;
1000
1001 return if $pl->{deny_save};
1002
1003 my $path = path $pl;
1004 my $guard = cf::lock_acquire "user_save:$path";
1005
1006 return if $pl->{deny_save};
1007
1008 aio_mkdir playerdir $pl, 0770;
1009 $pl->{last_save} = $cf::RUNTIME;
1010
1011 $pl->save_pl ($path);
1012 Coro::cede;
1013}
1014
1015sub new($) {
1016 my ($login) = @_;
1017
1018 my $self = create;
1019
1020 $self->ob->name ($login);
1021 $self->{deny_save} = 1;
1022
1023 $cf::PLAYER{$login} = $self;
1024
1025 $self
1026}
1027
1028=item $pl->quit_character
1029
1030Nukes the player without looking back. If logged in, the connection will
1031be destroyed. May block for a long time.
1032
1033=cut
1034
1035sub quit_character {
1036 my ($pl) = @_;
1037
1038 my $name = $pl->ob->name;
1039
1040 $pl->{deny_save} = 1;
1041 $pl->password ("*"); # this should lock out the player until we nuked the dir
1042
1043 $pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1) if $pl->active;
1044 $pl->deactivate;
1045 $pl->invoke (cf::EVENT_PLAYER_QUIT);
1046 $pl->ns->destroy if $pl->ns;
1047
1048 my $path = playerdir $pl;
1049 my $temp = "$path~$cf::RUNTIME~deleting~";
1050 aio_rename $path, $temp;
1051 delete $cf::PLAYER{$pl->ob->name};
1052 $pl->destroy;
1053
1054 my $prefix = qr<^~\Q$name\E/>;
1055
1056 # nuke player maps
1057 $cf::MAP{$_}->nuke for grep /$prefix/, keys %cf::MAP;
1058
1059 IO::AIO::aio_rmtree $temp;
1060}
1061
1062=item $pl->kick
1063
1064Kicks a player out of the game. This destroys the connection.
1065
1066=cut
1067
1068sub kick {
1069 my ($pl, $kicker) = @_;
1070
1071 $pl->invoke (cf::EVENT_PLAYER_KICK, $kicker);
1072 $pl->killer ("kicked");
1073 $pl->ns->destroy;
1074}
1075
1076=item cf::player::list_logins
1077
1078Returns am arrayref of all valid playernames in the system, can take a
1079while and may block, so not sync_job-capable, ever.
1080
1081=cut
1082
1083sub list_logins {
1084 my $dirs = aio_readdir cf::localdir . "/" . cf::playerdir
1085 or return [];
1086
1087 my @logins;
1088
1089 for my $login (@$dirs) {
1090 my $fh = aio_open path $login, Fcntl::O_RDONLY, 0 or next;
1091 aio_read $fh, 0, 512, my $buf, 0 or next;
1092 $buf !~ /^password -------------$/m or next; # official not-valid tag
1093
1094 utf8::decode $login;
1095 push @logins, $login;
1096 }
1097
1098 \@logins
1099}
1100
1101=item $player->maps
1102
1103Returns an arrayref of map paths that are private for this
1104player. May block.
1105
1106=cut
1107
1108sub maps($) {
1109 my ($pl) = @_;
1110
1111 $pl = ref $pl ? $pl->ob->name : $pl;
1112
1113 my $files = aio_readdir playerdir $pl
1114 or return;
1115
1116 my @paths;
1117
1118 for (@$files) {
1119 utf8::decode $_;
1120 next if /\.(?:pl|pst)$/;
1121 next unless /^$PATH_SEP/o;
1122
1123 push @paths, cf::map::normalise "~$pl/$_";
1124 }
1125
1126 \@paths
1127}
1128
1129=item $player->ext_reply ($msgid, $msgtype, %msg)
1130
1131Sends an ext reply to the player.
1132
1133=cut
1134
1135sub ext_reply($$$%) {
1136 my ($self, $id, %msg) = @_;
1137
1138 $msg{msgid} = $id;
1139
1140 $self->send ("ext " . cf::to_json \%msg);
1141}
1142
1143package cf;
1144
1145=back
1146
1147
1148=head3 cf::map
1149
1150=over 4
1151
1152=cut
1153
1154package cf::map;
1155
1156use Fcntl;
1157use Coro::AIO;
1158
1159use overload
1160 '""' => \&as_string,
1161 fallback => 1;
1162
1163our $MAX_RESET = 3600;
1164our $DEFAULT_RESET = 3000;
1165
1166sub generate_random_map {
1167 my ($self, $rmp) = @_;
1168 # mit "rum" bekleckern, nicht
1169 $self->_create_random_map (
1170 $rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
1171 $rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
1172 $rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
1173 $rmp->{exit_on_final_map},
1174 $rmp->{xsize}, $rmp->{ysize},
1175 $rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
1176 $rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
1177 $rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
1178 $rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
1179 $rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
1180 (cf::region::find $rmp->{region}), $rmp->{custom}
1181 )
1182}
1183
1184=item cf::map->register ($regex, $prio)
1185
1186Register a handler for the map path matching the given regex at the
1187givne priority (higher is better, built-in handlers have priority 0, the
1188default).
1189
1190=cut
1191
1192sub register {
1193 my (undef, $regex, $prio) = @_;
1194 my $pkg = caller;
1195
1196 no strict;
1197 push @{"$pkg\::ISA"}, __PACKAGE__;
1198
1199 $EXT_MAP{$pkg} = [$prio, qr<$regex>];
1200}
1201
1202# also paths starting with '/'
1203$EXT_MAP{"cf::map"} = [0, qr{^(?=/)}];
1204
1205sub thawer_merge {
1206 my ($self, $merge) = @_;
1207
1208 # we have to keep some variables in memory intact
1209 local $self->{path};
1210 local $self->{load_path};
1211 local $self->{deny_save};
1212 local $self->{deny_reset};
1213
1214 $self->SUPER::thawer_merge ($merge);
1215}
1216
1217sub normalise {
1218 my ($path, $base) = @_;
1219
1220 $path = "$path"; # make sure its a string
1221
1222 $path =~ s/\.map$//;
1223
1224 # map plan:
1225 #
1226 # /! non-realised random map exit (special hack!)
1227 # {... are special paths that are not being touched
1228 # ?xxx/... are special absolute paths
1229 # ?random/... random maps
1230 # /... normal maps
1231 # ~user/... per-player map of a specific user
1232
1233 $path =~ s/$PATH_SEP/\//go;
1234
1235 # treat it as relative path if it starts with
1236 # something that looks reasonable
1237 if ($path =~ m{^(?:\./|\.\./|\w)}) {
1238 $base or Carp::carp "normalise called with relative path and no base: '$path'";
1239
1240 $base =~ s{[^/]+/?$}{};
1241 $path = "$base/$path";
1242 }
1243
1244 for ($path) {
1245 redo if s{//}{/};
1246 redo if s{/\.?/}{/};
1247 redo if s{/[^/]+/\.\./}{/};
1248 }
1249
1250 $path
1251}
1252
1253sub new_from_path {
1254 my (undef, $path, $base) = @_;
1255
1256 return $path if UNIVERSAL::isa $path, "cf::map"; # already a map object
1257
1258 $path = normalise $path, $base;
1259
1260 for my $pkg (sort { $EXT_MAP{$b}[0] <=> $EXT_MAP{$a}[0] } keys %EXT_MAP) {
1261 if ($path =~ $EXT_MAP{$pkg}[1]) {
1262 my $self = bless cf::map::new, $pkg;
1263 $self->{path} = $path; $self->path ($path);
1264 $self->init; # pass $1 etc.
1265 return $self;
1266 }
1267 }
1268
1269 Carp::carp "unable to resolve path '$path' (base '$base').";
1270 ()
1271}
1272
1273sub init {
1274 my ($self) = @_;
1275
1276 $self
1277}
1278
1279sub as_string {
1280 my ($self) = @_;
1281
1282 "$self->{path}"
1283}
1284
1285# the displayed name, this is a one way mapping
1286sub visible_name {
1287 &as_string
1288}
1289
1290# the original (read-only) location
1291sub load_path {
1292 my ($self) = @_;
1293
1294 sprintf "%s/%s/%s.map", cf::datadir, cf::mapdir, $self->{path}
1295}
1296
1297# the temporary/swap location
1298sub save_path {
1299 my ($self) = @_;
1300
1301 (my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
1302 sprintf "%s/%s/%s.map", cf::localdir, cf::tmpdir, $path
1303}
1304
1305# the unique path, undef == no special unique path
1306sub uniq_path {
1307 my ($self) = @_;
1308
1309 (my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
1310 sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $path
1311}
1312
1313# and all this just because we cannot iterate over
1314# all maps in C++...
1315sub change_all_map_light {
1316 my ($change) = @_;
1317
1318 $_->change_map_light ($change)
1319 for grep $_->outdoor, values %cf::MAP;
1320}
1321
1322sub unlink_save {
1323 my ($self) = @_;
1324
1325 utf8::encode (my $save = $self->save_path);
1326 IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink $save;
1327 IO::AIO::aioreq_pri 4; Coro::AIO::aio_unlink "$save.pst";
1328}
1329
1330sub load_header_from($) {
1331 my ($self, $path) = @_;
1332
1333 utf8::encode $path;
1334 #aio_open $path, O_RDONLY, 0
1335 # or return;
1336
1337 $self->_load_header ($path)
1338 or return;
1339
1340 $self->{load_path} = $path;
1341
1342 1
1343}
1344
1345sub load_header_orig {
1346 my ($self) = @_;
1347
1348 $self->load_header_from ($self->load_path)
1349}
1350
1351sub load_header_temp {
1352 my ($self) = @_;
1353
1354 $self->load_header_from ($self->save_path)
1355}
1356
1357sub prepare_temp {
1358 my ($self) = @_;
1359
1360 $self->last_access ((delete $self->{last_access})
1361 || $cf::RUNTIME); #d#
1362 # safety
1363 $self->{instantiate_time} = $cf::RUNTIME
1364 if $self->{instantiate_time} > $cf::RUNTIME;
1365}
1366
1367sub prepare_orig {
1368 my ($self) = @_;
1369
1370 $self->{load_original} = 1;
1371 $self->{instantiate_time} = $cf::RUNTIME;
1372 $self->last_access ($cf::RUNTIME);
1373 $self->instantiate;
1374}
1375
1376sub load_header {
1377 my ($self) = @_;
1378
1379 if ($self->load_header_temp) {
1380 $self->prepare_temp;
1381 } else {
1382 $self->load_header_orig
1383 or return;
1384 $self->prepare_orig;
1385 }
1386
1387 1
1388}
1389
1390sub find;
1391sub find {
1392 my ($path, $origin) = @_;
1393
1394 $path = normalise $path, $origin && $origin->path;
1395
1396 cf::lock_wait "map_find:$path";
1397
1398 $cf::MAP{$path} || do {
1399 my $guard = cf::lock_acquire "map_find:$path";
1400 my $map = new_from_path cf::map $path
1401 or return;
1402
1403 $map->{last_save} = $cf::RUNTIME;
1404
1405 $map->load_header
1406 or return;
1407
1408 if ($map->should_reset && 0) {#d#TODO# disabled, crashy (locking issue?)
1409 # doing this can freeze the server in a sync job, obviously
1410 #$cf::WAIT_FOR_TICK->wait;
1411 $map->reset;
1412 undef $guard;
1413 return find $path;
1414 }
1415
1416 $cf::MAP{$path} = $map
1417 }
1418}
1419
1420sub pre_load { }
1421sub post_load { }
1422
1423sub load {
1424 my ($self) = @_;
1425
1426 local $self->{deny_reset} = 1; # loading can take a long time
1427
1428 my $path = $self->{path};
1429 my $guard = cf::lock_acquire "map_load:$path";
1430
1431 return if $self->in_memory != cf::MAP_SWAPPED;
1432
1433 $self->in_memory (cf::MAP_LOADING);
1434
1435 $self->alloc;
1436
1437 $self->pre_load;
1438
1439 $self->_load_objects ($self->{load_path}, 1)
1440 or return;
1441
1442 $self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
1443 if delete $self->{load_original};
1444
1445 if (my $uniq = $self->uniq_path) {
1446 utf8::encode $uniq;
1447 if (aio_open $uniq, O_RDONLY, 0) {
1448 $self->clear_unique_items;
1449 $self->_load_objects ($uniq, 0);
1450 }
1451 }
1452
1453 Coro::cede;
1454
1455 # now do the right thing for maps
1456 $self->link_multipart_objects;
1457
1458 unless ($self->{deny_activate}) {
1459 $self->decay_objects;
1460 $self->fix_auto_apply;
1461 $self->update_buttons;
1462 Coro::cede;
1463 $self->set_darkness_map;
1464 $self->difficulty ($self->estimate_difficulty)
1465 unless $self->difficulty;
1466 Coro::cede;
1467 $self->activate;
1468 }
1469
1470 $self->post_load;
1471
1472 $self->in_memory (cf::MAP_IN_MEMORY);
1473}
1474
1475sub customise_for {
1476 my ($self, $ob) = @_;
1477
1478 return find "~" . $ob->name . "/" . $self->{path}
1479 if $self->per_player;
1480
1481 $self
1482}
1483
1484# find and load all maps in the 3x3 area around a map
1485sub load_diag {
1486 my ($map) = @_;
1487
1488 my @diag; # diagonal neighbours
1489
1490 for (0 .. 3) {
1491 my $neigh = $map->tile_path ($_)
1492 or next;
1493 $neigh = find $neigh, $map
1494 or next;
1495 $neigh->load;
1496
1497 push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
1498 [$neigh->tile_path (($_ + 1) % 4), $neigh];
1499 }
1500
1501 for (@diag) {
1502 my $neigh = find @$_
1503 or next;
1504 $neigh->load;
1505 }
1506}
1507
1508sub find_sync {
1509 my ($path, $origin) = @_;
1510
1511 cf::sync_job { find $path, $origin }
1512}
1513
1514sub do_load_sync {
1515 my ($map) = @_;
1516
1517 cf::sync_job { $map->load };
1518}
1519
1520our %MAP_PREFETCH;
1521our $MAP_PREFETCHER = undef;
1522
1523sub find_async {
1524 my ($path, $origin) = @_;
1525
1526 $path = normalise $path, $origin && $origin->{path};
1527
1528 if (my $map = $cf::MAP{$path}) {
1529 return $map if $map->in_memory == cf::MAP_IN_MEMORY;
1530 }
1531
1532 undef $MAP_PREFETCH{$path};
1533 $MAP_PREFETCHER ||= cf::async {
1534 while (%MAP_PREFETCH) {
1535 for my $path (keys %MAP_PREFETCH) {
1536 my $map = find $path
1537 or next;
1538 $map->load;
1539
1540 delete $MAP_PREFETCH{$path};
1541 }
1542 }
1543 undef $MAP_PREFETCHER;
1544 };
1545 $MAP_PREFETCHER->prio (6);
1546
1547 ()
1548}
1549
1550sub save {
1551 my ($self) = @_;
1552
1553 my $lock = cf::lock_acquire "map_data:" . $self->path;
1554
1555 $self->{last_save} = $cf::RUNTIME;
1556
1557 return unless $self->dirty;
1558
1559 my $save = $self->save_path; utf8::encode $save;
1560 my $uniq = $self->uniq_path; utf8::encode $uniq;
1561
1562 $self->{load_path} = $save;
1563
1564 return if $self->{deny_save};
1565
1566 local $self->{last_access} = $self->last_access;#d#
1567
1568 cf::async {
1569 $_->contr->save for $self->players;
1570 };
1571
1572 if ($uniq) {
1573 $self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
1574 $self->_save_objects ($uniq, cf::IO_UNIQUES);
1575 } else {
1576 $self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
1577 }
1578}
1579
1580sub swap_out {
1581 my ($self) = @_;
1582
1583 # save first because save cedes
1584 $self->save;
1585
1586 my $lock = cf::lock_acquire "map_data:" . $self->path;
1587
1588 return if $self->players;
1589 return if $self->in_memory != cf::MAP_IN_MEMORY;
1590 return if $self->{deny_save};
1591
1592 $self->clear;
1593 $self->in_memory (cf::MAP_SWAPPED);
1594}
1595
1596sub reset_at {
1597 my ($self) = @_;
1598
1599 # TODO: safety, remove and allow resettable per-player maps
1600 return 1e99 if $self->isa ("ext::map_per_player");#d#
1601 return 1e99 if $self->{deny_reset};
1602
1603 my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
1604 my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
1605
1606 $time + $to
1607}
1608
1609sub should_reset {
1610 my ($self) = @_;
1611
1612 $self->reset_at <= $cf::RUNTIME
1613}
1614
1615sub reset {
1616 my ($self) = @_;
1617
1618 my $lock = cf::lock_acquire "map_data:$self->{path}";
1619
1620 return if $self->players;
1621 return if $self->isa ("ext::map_per_player");#d#
1622
1623 warn "resetting map ", $self->path;#d#
1624
1625 $self->in_memory (cf::MAP_SWAPPED);
1626
1627 # need to save uniques path
1628 unless ($self->{deny_save}) {
1629 my $uniq = $self->uniq_path; utf8::encode $uniq;
1630
1631 $self->_save_objects ($uniq, cf::IO_UNIQUES)
1632 if $uniq;
1633 }
1634
1635 delete $cf::MAP{$self->path};
1636
1637 $self->clear;
1638
1639 $_->clear_links_to ($self) for values %cf::MAP;
1640
1641 $self->unlink_save;
1642 $self->destroy;
1643}
1644
1645my $nuke_counter = "aaaa";
1646
1647sub nuke {
1648 my ($self) = @_;
1649
1650 delete $cf::MAP{$self->path};
1651
1652 $self->unlink_save;
1653
1654 bless $self, "cf::map";
1655 delete $self->{deny_reset};
1656 $self->{deny_save} = 1;
1657 $self->reset_timeout (1);
1658 $self->path ($self->{path} = "{nuke}/" . ($nuke_counter++));
1659
1660 $cf::MAP{$self->path} = $self;
1661
1662 $self->reset; # polite request, might not happen
1663}
1664
1665=item cf::map::unique_maps
1666
1667Returns an arrayref of paths of all shared maps that have
1668instantiated unique items. May block.
1669
1670=cut
1671
1672sub unique_maps() {
1673 my $files = aio_readdir cf::localdir . "/" . cf::uniquedir
1674 or return;
1675
1676 my @paths;
1677
1678 for (@$files) {
1679 utf8::decode $_;
1680 next if /\.pst$/;
1681 next unless /^$PATH_SEP/o;
1682
1683 push @paths, cf::map::normalise $_;
1684 }
1685
1686 \@paths
1687}
1688
1689package cf;
1690
1691=back
1692
1693=head3 cf::object
1694
1695=cut
1696
1697package cf::object;
1698
1699=over 4
1700
1701=item $ob->inv_recursive
1702
1703Returns the inventory of the object _and_ their inventories, recursively.
1704
1705=cut
1706
1707sub inv_recursive_;
1708sub inv_recursive_ {
1709 map { $_, inv_recursive_ $_->inv } @_
1710}
1711
1712sub inv_recursive {
1713 inv_recursive_ inv $_[0]
1714}
1715
1716package cf;
1717
1718=back
1719
1720=head3 cf::object::player
1721
1722=over 4
1723
1724=item $player_object->reply ($npc, $msg[, $flags])
1725
1726Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
1727can be C<undef>. Does the right thing when the player is currently in a
1728dialogue with the given NPC character.
1729
1730=cut
1731
1732# rough implementation of a future "reply" method that works
1733# with dialog boxes.
1734#TODO: the first argument must go, split into a $npc->reply_to ( method
1735sub cf::object::player::reply($$$;$) {
1736 my ($self, $npc, $msg, $flags) = @_;
1737
1738 $flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
1739
1740 if ($self->{record_replies}) {
1741 push @{ $self->{record_replies} }, [$npc, $msg, $flags];
1742 } else {
1743 $msg = $npc->name . " says: $msg" if $npc;
1744 $self->message ($msg, $flags);
1745 }
1746}
1747
1748=item $player_object->may ("access")
1749
1750Returns wether the given player is authorized to access resource "access"
1751(e.g. "command_wizcast").
1752
1753=cut
1754
1755sub cf::object::player::may {
1756 my ($self, $access) = @_;
1757
1758 $self->flag (cf::FLAG_WIZ) ||
1759 (ref $cf::CFG{"may_$access"}
1760 ? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
1761 : $cf::CFG{"may_$access"})
1762}
1763
1764=item $player_object->enter_link
1765
1766Freezes the player and moves him/her to a special map (C<{link}>).
1767
1768The player should be reasonably safe there for short amounts of time. You
1769I<MUST> call C<leave_link> as soon as possible, though.
1770
1771Will never block.
1772
1773=item $player_object->leave_link ($map, $x, $y)
1774
1775Moves the player out of the special C<{link}> map onto the specified
1776map. If the map is not valid (or omitted), the player will be moved back
1777to the location he/she was before the call to C<enter_link>, or, if that
1778fails, to the emergency map position.
1779
1780Might block.
1781
1782=cut
1783
1784sub link_map {
1785 unless ($LINK_MAP) {
1786 $LINK_MAP = cf::map::find "{link}"
1787 or cf::cleanup "FATAL: unable to provide {link} map, exiting.";
1788 $LINK_MAP->load;
1789 }
1790
1791 $LINK_MAP
1792}
1793
1794sub cf::object::player::enter_link {
1795 my ($self) = @_;
1796
1797 $self->deactivate_recursive;
1798
1799 return if UNIVERSAL::isa $self->map, "ext::map_link";
1800
1801 $self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
1802 if $self->map;
1803
1804 $self->enter_map ($LINK_MAP || link_map, 10, 10);
1805}
1806
1807sub cf::object::player::leave_link {
1808 my ($self, $map, $x, $y) = @_;
1809
1810 my $link_pos = delete $self->{_link_pos};
1811
1812 unless ($map) {
1813 # restore original map position
1814 ($map, $x, $y) = @{ $link_pos || [] };
1815 $map = cf::map::find $map;
1816
1817 unless ($map) {
1818 ($map, $x, $y) = @$EMERGENCY_POSITION;
1819 $map = cf::map::find $map
1820 or die "FATAL: cannot load emergency map\n";
1821 }
1822 }
1823
1824 ($x, $y) = (-1, -1)
1825 unless (defined $x) && (defined $y);
1826
1827 # use -1 or undef as default coordinates, not 0, 0
1828 ($x, $y) = ($map->enter_x, $map->enter_y)
1829 if $x <=0 && $y <= 0;
1830
1831 $map->load;
1832 $map->load_diag;
1833
1834 return unless $self->contr->active;
1835 $self->activate_recursive;
1836
1837 local $self->{_prev_pos} = $link_pos; # ugly hack for rent.ext
1838 $self->enter_map ($map, $x, $y);
1839}
1840
1841cf::player->attach (
1842 on_logout => sub {
1843 my ($pl) = @_;
1844
1845 # abort map switching before logout
1846 if ($pl->ob->{_link_pos}) {
1847 cf::sync_job {
1848 $pl->ob->leave_link
1849 };
1850 }
1851 },
1852 on_login => sub {
1853 my ($pl) = @_;
1854
1855 # try to abort aborted map switching on player login :)
1856 # should happen only on crashes
1857 if ($pl->ob->{_link_pos}) {
1858 $pl->ob->enter_link;
1859 (async {
1860 $pl->ob->reply (undef,
1861 "There was an internal problem at your last logout, "
1862 . "the server will try to bring you to your intended destination in a second.",
1863 cf::NDI_RED);
1864 # we need this sleep as the login has a concurrent enter_exit running
1865 # and this sleep increases chances of the player not ending up in scorn
1866 Coro::Timer::sleep 1;
1867 $pl->ob->leave_link;
1868 })->prio (2);
1869 }
1870 },
1871);
1872
1873=item $player_object->goto ($path, $x, $y)
1874
1875=cut
1876
1877sub cf::object::player::goto {
1878 my ($self, $path, $x, $y) = @_;
1879
1880 $self->enter_link;
1881
1882 (async {
1883 my $map = eval {
1884 my $map = cf::map::find $path;
1885 $map = $map->customise_for ($self) if $map;
1886 $map
1887 } or
1888 $self->message ("The exit to '$path' is closed", cf::NDI_UNIQUE | cf::NDI_RED);
1889
1890 $self->leave_link ($map, $x, $y);
1891 })->prio (1);
1892}
1893
1894=item $player_object->enter_exit ($exit_object)
1895
1896=cut
1897
1898sub parse_random_map_params {
1899 my ($spec) = @_;
1900
1901 my $rmp = { # defaults
1902 xsize => (cf::rndm 15, 40),
1903 ysize => (cf::rndm 15, 40),
1904 symmetry => (cf::rndm 1, cf::SYMMETRY_XY),
1905 #layout => string,
1906 };
1907
1908 for (split /\n/, $spec) {
1909 my ($k, $v) = split /\s+/, $_, 2;
1910
1911 $rmp->{lc $k} = $v if (length $k) && (length $v);
1912 }
1913
1914 $rmp
1915}
1916
1917sub prepare_random_map {
1918 my ($exit) = @_;
1919
1920 my $guard = cf::lock_acquire "exit_prepare:$exit";
1921
1922 # all this does is basically replace the /! path by
1923 # a new random map path (?random/...) with a seed
1924 # that depends on the exit object
1925
1926 my $rmp = parse_random_map_params $exit->msg;
1927
1928 if ($exit->map) {
1929 $rmp->{region} = $exit->region->name;
1930 $rmp->{origin_map} = $exit->map->path;
1931 $rmp->{origin_x} = $exit->x;
1932 $rmp->{origin_y} = $exit->y;
1933 }
1934
1935 $rmp->{random_seed} ||= $exit->random_seed;
1936
1937 my $data = cf::to_json $rmp;
1938 my $md5 = Digest::MD5::md5_hex $data;
1939 my $meta = "$cf::RANDOM_MAPS/$md5.meta";
1940
1941 if (my $fh = aio_open "$meta~", O_WRONLY | O_CREAT, 0666) {
1942 aio_write $fh, 0, (length $data), $data, 0;
1943 undef $fh;
1944 aio_rename "$meta~", $meta;
1945
1946 $exit->slaying ("?random/$md5");
1947 $exit->msg (undef);
1948 }
1949}
1950
1951sub cf::object::player::enter_exit {
1952 my ($self, $exit) = @_;
1953
1954 return unless $self->type == cf::PLAYER;
1955
1956 if ($exit->slaying eq "/!") {
1957 #TODO: this should de-fi-ni-te-ly not be a sync-job
1958 cf::sync_job { prepare_random_map $exit };
1959 }
1960
1961 my $slaying = cf::map::normalise $exit->slaying, $exit->map && $exit->map->path;
1962 my $hp = $exit->stats->hp;
1963 my $sp = $exit->stats->sp;
1964
1965 $self->enter_link;
1966
1967 (async {
1968 $self->deactivate_recursive; # just to be sure
1969 unless (eval {
1970 $self->goto ($slaying, $hp, $sp);
1971
1972 1;
1973 }) {
1974 $self->message ("Something went wrong deep within the crossfire server. "
1975 . "I'll try to bring you back to the map you were before. "
1976 . "Please report this to the dungeon master!",
1977 cf::NDI_UNIQUE | cf::NDI_RED);
1978
1979 warn "ERROR in enter_exit: $@";
1980 $self->leave_link;
1981 }
1982 })->prio (1);
1983}
1984
1985=head3 cf::client
1986
1987=over 4
1988
1989=item $client->send_drawinfo ($text, $flags)
1990
1991Sends a drawinfo packet to the client. Circumvents output buffering so
1992should not be used under normal circumstances.
1993
1994=cut
1995
1996sub cf::client::send_drawinfo {
1997 my ($self, $text, $flags) = @_;
1998
1999 utf8::encode $text;
2000 $self->send_packet (sprintf "drawinfo %d %s", $flags || cf::NDI_BLACK, $text);
2001}
2002
2003
2004=item $success = $client->query ($flags, "text", \&cb)
2005
2006Queues a query to the client, calling the given callback with
2007the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
2008C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
2009
2010Queries can fail, so check the return code. Or don't, as queries will become
2011reliable at some point in the future.
2012
2013=cut
2014
2015sub cf::client::query {
2016 my ($self, $flags, $text, $cb) = @_;
2017
2018 return unless $self->state == ST_PLAYING
2019 || $self->state == ST_SETUP
2020 || $self->state == ST_CUSTOM;
2021
2022 $self->state (ST_CUSTOM);
2023
2024 utf8::encode $text;
2025 push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
2026
2027 $self->send_packet ($self->{query_queue}[0][0])
2028 if @{ $self->{query_queue} } == 1;
2029}
2030
2031cf::client->attach (
2032 on_reply => sub {
2033 my ($ns, $msg) = @_;
2034
2035 # this weird shuffling is so that direct followup queries
2036 # get handled first
2037 my $queue = delete $ns->{query_queue}
2038 or return; # be conservative, not sure how that can happen, but we saw a crash here
2039
2040 (shift @$queue)->[1]->($msg);
2041 return unless $ns->valid; # temporary(?) workaround for callback destroying socket
2042
2043 push @{ $ns->{query_queue} }, @$queue;
2044
2045 if (@{ $ns->{query_queue} } == @$queue) {
2046 if (@$queue) {
2047 $ns->send_packet ($ns->{query_queue}[0][0]);
2048 } else {
2049 $ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
2050 }
2051 }
2052 },
2053);
2054
2055=item $client->async (\&cb)
2056
2057Create a new coroutine, running the specified callback. The coroutine will
2058be automatically cancelled when the client gets destroyed (e.g. on logout,
2059or loss of connection).
2060
2061=cut
2062
2063sub cf::client::async {
2064 my ($self, $cb) = @_;
2065
2066 my $coro = &Coro::async ($cb);
2067
2068 $coro->on_destroy (sub {
2069 delete $self->{_coro}{$coro+0};
2070 });
2071
2072 $self->{_coro}{$coro+0} = $coro;
2073
2074 $coro
2075}
2076
2077cf::client->attach (
2078 on_destroy => sub {
2079 my ($ns) = @_;
2080
2081 $_->cancel for values %{ (delete $ns->{_coro}) || {} };
2082 },
2083);
2084
2085=back
2086
2087
2088=head2 SAFE SCRIPTING
2089
2090Functions that provide a safe environment to compile and execute
2091snippets of perl code without them endangering the safety of the server
2092itself. Looping constructs, I/O operators and other built-in functionality
2093is not available in the safe scripting environment, and the number of
2094functions and methods that can be called is greatly reduced.
2095
2096=cut
2097
2098our $safe = new Safe "safe";
2099our $safe_hole = new Safe::Hole;
2100
2101$SIG{FPE} = 'IGNORE';
2102
2103$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
2104
2105# here we export the classes and methods available to script code
2106
2107=pod
2108
2109The following functions and methods are available within a safe environment:
2110
2111 cf::object contr pay_amount pay_player map
2112 cf::object::player player
2113 cf::player peaceful
2114 cf::map trigger
2115
2116=cut
2117
2118for (
2119 ["cf::object" => qw(contr pay_amount pay_player map)],
2120 ["cf::object::player" => qw(player)],
2121 ["cf::player" => qw(peaceful)],
2122 ["cf::map" => qw(trigger)],
2123) {
121 no strict 'refs'; 2124 no strict 'refs';
2125 my ($pkg, @funs) = @$_;
2126 *{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
2127 for @funs;
2128}
122 2129
123# @{"$pkg\::ISA"} = cf::ext::; 2130=over 4
124 2131
125 for my $idx (0 .. $#EVENT) { 2132=item @retval = safe_eval $code, [var => value, ...]
126 if (my $ref = $pkg->can ("on_$EVENT[$idx]")) { 2133
127 warn "registering $EVENT[$idx] hook\n"; 2134Compiled and executes the given perl code snippet. additional var/value
128 $hook[$idx]{$pkg} = $ref; 2135pairs result in temporary local (my) scalar variables of the given name
2136that are available in the code snippet. Example:
2137
2138 my $five = safe_eval '$first + $second', first => 1, second => 4;
2139
2140=cut
2141
2142sub safe_eval($;@) {
2143 my ($code, %vars) = @_;
2144
2145 my $qcode = $code;
2146 $qcode =~ s/"/‟/g; # not allowed in #line filenames
2147 $qcode =~ s/\n/\\n/g;
2148
2149 local $_;
2150 local @safe::cf::_safe_eval_args = values %vars;
2151
2152 my $eval =
2153 "do {\n"
2154 . "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
2155 . "#line 0 \"{$qcode}\"\n"
2156 . $code
2157 . "\n}"
2158 ;
2159
2160 sub_generation_inc;
2161 my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
2162 sub_generation_inc;
2163
2164 if ($@) {
2165 warn "$@";
2166 warn "while executing safe code '$code'\n";
2167 warn "with arguments " . (join " ", %vars) . "\n";
2168 }
2169
2170 wantarray ? @res : $res[0]
2171}
2172
2173=item cf::register_script_function $function => $cb
2174
2175Register a function that can be called from within map/npc scripts. The
2176function should be reasonably secure and should be put into a package name
2177like the extension.
2178
2179Example: register a function that gets called whenever a map script calls
2180C<rent::overview>, as used by the C<rent> extension.
2181
2182 cf::register_script_function "rent::overview" => sub {
2183 ...
2184 };
2185
2186=cut
2187
2188sub register_script_function {
2189 my ($fun, $cb) = @_;
2190
2191 no strict 'refs';
2192 *{"safe::$fun"} = $safe_hole->wrap ($cb);
2193}
2194
2195=back
2196
2197=cut
2198
2199#############################################################################
2200
2201=head2 EXTENSION DATABASE SUPPORT
2202
2203Crossfire maintains a very simple database for extension use. It can
2204currently store anything that can be serialised using Storable, which
2205excludes objects.
2206
2207The parameter C<$family> should best start with the name of the extension
2208using it, it should be unique.
2209
2210=over 4
2211
2212=item $value = cf::db_get $family => $key
2213
2214Returns a single value from the database.
2215
2216=item cf::db_put $family => $key => $value
2217
2218Stores the given C<$value> in the family.
2219
2220=cut
2221
2222our $DB;
2223
2224sub db_init {
2225 unless ($DB) {
2226 $DB = BDB::db_create $DB_ENV;
2227
2228 cf::sync_job {
2229 eval {
2230 $DB->set_flags (BDB::CHKSUM);
2231
2232 BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
2233 BDB::CREATE | BDB::AUTO_COMMIT, 0666;
2234 cf::cleanup "db_open(db): $!" if $!;
2235 };
2236 cf::cleanup "db_open(db): $@" if $@;
129 } 2237 };
130 }
131}
132 2238
133sub unload_extension { 2239 my $path = cf::localdir . "/database.pst";
134 my ($pkg) = @_; 2240 if (stat $path) {
2241 cf::sync_job {
2242 my $pst = Storable::retrieve $path;
135 2243
136 warn "removing extension $pkg\n"; 2244 cf::db_put (board => data => $pst->{board});
2245 cf::db_put (guildrules => data => $pst->{guildrules});
2246 cf::db_put (rent => balance => $pst->{rent}{balance});
2247 BDB::db_env_txn_checkpoint $DB_ENV;
137 2248
138 # remove hooks 2249 unlink $path;
139 for my $idx (0 .. $#EVENT) { 2250 };
140 delete $hook[$idx]{$pkg}; 2251 }
141 } 2252 }
2253}
142 2254
143 # remove commands 2255sub db_get($$) {
144 for my $name (keys %command) { 2256 my $key = "$_[0]/$_[1]";
145 my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
146 2257
147 if (@cb) { 2258 cf::sync_job {
148 $command{$name} = \@cb; 2259 BDB::db_get $DB, undef, $key, my $data;
149 $COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb; 2260
2261 $! ? ()
2262 : Compress::LZF::sthaw $data
2263 }
2264}
2265
2266sub db_put($$$) {
2267 BDB::dbreq_pri 4;
2268 BDB::db_put $DB, undef, "$_[0]/$_[1]", Compress::LZF::sfreeze_cr $_[2], 0, sub { };
2269}
2270
2271#############################################################################
2272# the server's init and main functions
2273
2274sub load_facedata {
2275 my $path = sprintf "%s/facedata", cf::datadir;
2276
2277 warn "loading facedata from $path\n";
2278
2279 my $faces;
2280 0 < aio_load $path, $faces
2281 or die "$path: $!";
2282
2283 Coro::cede;
2284 $faces = Storable::thaw $faces;
2285 Coro::cede;
2286
2287 my $meta = delete $faces->{""};
2288 $meta->{version} == 1
2289 or cf::cleanup "$path: version mismatch, cannot proceed.";
2290
2291 while (my ($face, $info) = each %$faces) {
2292 my $idx = (cf::face::find $face) || cf::face::alloc $face;
2293 cf::face::set $idx, $info->{visibility}, $info->{magicmap};
2294 cf::face::set_data $idx, 0, $info->{data32}, $info->{chksum32};
2295 cf::face::set_data $idx, 1, $info->{data64}, $info->{chksum64};
2296 Coro::cede;
2297 }
2298
2299 while (my ($face, $info) = each %$faces) {
2300 next unless $info->{smooth};
2301 my $idx = cf::face::find $face
2302 or next;
2303 if (my $smooth = cf::face::find $info->{smooth}) {
2304 cf::face::set_smooth $idx, $smooth;
150 } else { 2305 } else {
151 delete $command{$name}; 2306 warn "smooth face '$info->{smooth}' not found for face '$face'";
152 delete $COMMAND{"$name\000"}; 2307 }
2308 Coro::cede;
2309 }
2310
2311 1
2312}
2313
2314sub reload_resources {
2315 load_resource_file sprintf "%s/%s/regions", cf::datadir, cf::mapdir
2316 or die "unable to load regions file\n";#d#
2317 load_facedata
2318 or die "unable to load facedata\n";#d#
2319}
2320
2321sub init {
2322 reload_resources;
2323}
2324
2325sub cfg_load {
2326 open my $fh, "<:utf8", cf::confdir . "/config"
2327 or return;
2328
2329 local $/;
2330 *CFG = YAML::Syck::Load <$fh>;
2331
2332 $EMERGENCY_POSITION = $CFG{emergency_position} || ["/world/world_105_115", 5, 37];
2333
2334 $cf::map::MAX_RESET = $CFG{map_max_reset} if exists $CFG{map_max_reset};
2335 $cf::map::DEFAULT_RESET = $CFG{map_default_reset} if exists $CFG{map_default_reset};
2336
2337 if (exists $CFG{mlockall}) {
2338 eval {
2339 $CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
2340 and die "WARNING: m(un)lockall failed: $!\n";
153 } 2341 };
2342 warn $@ if $@;
2343 }
2344}
2345
2346sub main {
2347 # we must not ever block the main coroutine
2348 local $Coro::idle = sub {
2349 Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
2350 (async {
2351 Event::one_event;
2352 })->prio (Coro::PRIO_MAX);
154 } 2353 };
155 2354
2355 cfg_load;
2356 db_init;
2357 load_extensions;
2358
2359 $TICK_WATCHER->start;
2360 Event::loop;
2361}
2362
2363#############################################################################
2364# initialisation and cleanup
2365
2366# install some emergency cleanup handlers
2367BEGIN {
2368 for my $signal (qw(INT HUP TERM)) {
2369 Event->signal (
2370 reentrant => 0,
2371 data => WF_AUTOCANCEL,
2372 signal => $signal,
2373 prio => 0,
2374 cb => sub {
2375 cf::cleanup "SIG$signal";
2376 },
2377 );
2378 }
2379}
2380
2381sub emergency_save() {
2382 my $freeze_guard = cf::freeze_mainloop;
2383
2384 warn "enter emergency perl save\n";
2385
2386 cf::sync_job {
2387 # use a peculiar iteration method to avoid tripping on perl
2388 # refcount bugs in for. also avoids problems with players
2389 # and maps saved/destroyed asynchronously.
2390 warn "begin emergency player save\n";
2391 for my $login (keys %cf::PLAYER) {
2392 my $pl = $cf::PLAYER{$login} or next;
2393 $pl->valid or next;
2394 $pl->save;
2395 }
2396 warn "end emergency player save\n";
2397
2398 warn "begin emergency map save\n";
2399 for my $path (keys %cf::MAP) {
2400 my $map = $cf::MAP{$path} or next;
2401 $map->valid or next;
2402 $map->save;
2403 }
2404 warn "end emergency map save\n";
2405
2406 warn "begin emergency database checkpoint\n";
2407 BDB::db_env_txn_checkpoint $DB_ENV;
2408 warn "end emergency database checkpoint\n";
2409 };
2410
2411 warn "leave emergency perl save\n";
2412}
2413
2414sub post_cleanup {
2415 my ($make_core) = @_;
2416
2417 warn Carp::longmess "post_cleanup backtrace"
2418 if $make_core;
2419}
2420
2421sub reload() {
2422 # can/must only be called in main
2423 if ($Coro::current != $Coro::main) {
2424 warn "can only reload from main coroutine";
2425 return;
2426 }
2427
2428 warn "reloading...";
2429
2430 warn "entering sync_job";
2431
2432 cf::sync_job {
2433 cf::write_runtime; # external watchdog should not bark
2434 cf::emergency_save;
2435 cf::write_runtime; # external watchdog should not bark
2436
2437 warn "syncing database to disk";
2438 BDB::db_env_txn_checkpoint $DB_ENV;
2439
2440 # if anything goes wrong in here, we should simply crash as we already saved
2441
2442 warn "cancelling all WF_AUTOCANCEL watchers";
2443 for (Event::all_watchers) {
2444 $_->cancel if $_->data & WF_AUTOCANCEL;
2445 }
2446
2447 warn "flushing outstanding aio requests";
2448 for (;;) {
2449 BDB::flush;
2450 IO::AIO::flush;
2451 Coro::cede;
2452 last unless IO::AIO::nreqs || BDB::nreqs;
2453 warn "iterate...";
2454 }
2455
2456 ++$RELOAD;
2457
2458 warn "cancelling all extension coros";
2459 $_->cancel for values %EXT_CORO;
2460 %EXT_CORO = ();
2461
2462 warn "removing commands";
2463 %COMMAND = ();
2464
2465 warn "removing ext commands";
2466 %EXTCMD = ();
2467
2468 warn "unloading/nuking all extensions";
2469 for my $pkg (@EXTS) {
2470 warn "... unloading $pkg";
2471
2472 if (my $cb = $pkg->can ("unload")) {
2473 eval {
2474 $cb->($pkg);
2475 1
2476 } or warn "$pkg unloaded, but with errors: $@";
2477 }
2478
2479 warn "... nuking $pkg";
156 Symbol::delete_package $pkg; 2480 Symbol::delete_package $pkg;
157} 2481 }
158 2482
159sub load_extensions { 2483 warn "unloading all perl modules loaded from $LIBDIR";
160 my $LIBDIR = maps_directory "perl"; 2484 while (my ($k, $v) = each %INC) {
2485 next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
161 2486
162 for my $ext (<$LIBDIR/*.ext>) { 2487 warn "... unloading $k";
2488 delete $INC{$k};
2489
2490 $k =~ s/\.pm$//;
2491 $k =~ s/\//::/g;
2492
2493 if (my $cb = $k->can ("unload_module")) {
2494 $cb->();
2495 }
2496
2497 Symbol::delete_package $k;
2498 }
2499
2500 warn "getting rid of safe::, as good as possible";
2501 Symbol::delete_package "safe::$_"
2502 for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
2503
2504 warn "unloading cf.pm \"a bit\"";
2505 delete $INC{"cf.pm"};
2506
2507 # don't, removes xs symbols, too,
2508 # and global variables created in xs
2509 #Symbol::delete_package __PACKAGE__;
2510
2511 warn "unload completed, starting to reload now";
2512
2513 warn "reloading cf.pm";
2514 require cf;
2515 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
2516
2517 warn "loading config and database again";
2518 cf::cfg_load;
2519
2520 warn "loading extensions";
163 load_extension $ext; 2521 cf::load_extensions;
2522
2523 warn "reattaching attachments to objects/players";
2524 _global_reattach; # objects, sockets
2525 warn "reattaching attachments to maps";
2526 reattach $_ for values %MAP;
2527 warn "reattaching attachments to players";
2528 reattach $_ for values %PLAYER;
2529
2530 warn "loading reloadable resources";
2531 reload_resources;
2532
2533 warn "leaving sync_job";
2534
2535 1
2536 } or do {
2537 warn $@;
2538 warn "error while reloading, exiting.";
2539 exit 1;
164 } 2540 };
165}
166 2541
2542 warn "reloaded";
2543};
2544
2545our $RELOAD_WATCHER; # used only during reload
2546
167register_command "perl-reload", 0, sub { 2547register_command "reload" => sub {
168 my ($who, $arg) = @_; 2548 my ($who, $arg) = @_;
169 2549
170 if ($who->flag (FLAG_WIZ)) { 2550 if ($who->flag (FLAG_WIZ)) {
171 warn "reloading...\n"; 2551 $who->message ("reloading server.");
172 unload_extension $_ for @exts; 2552
173 @exts = 0; 2553 # doing reload synchronously and two reloads happen back-to-back,
174 load_extensions; 2554 # coro crashes during coro_state_free->destroy here.
175 warn "reloaded\n"; 2555
2556 $RELOAD_WATCHER ||= Event->timer (
2557 reentrant => 0,
2558 after => 0,
2559 data => WF_AUTOCANCEL,
2560 cb => sub {
2561 reload;
2562 undef $RELOAD_WATCHER;
2563 },
2564 );
176 } 2565 }
177}; 2566};
178 2567
179load_extensions; 2568unshift @INC, $LIBDIR;
2569
2570my $bug_warning = 0;
2571
2572$TICK_WATCHER = Event->timer (
2573 reentrant => 0,
2574 parked => 1,
2575 prio => 0,
2576 at => $NEXT_TICK || $TICK,
2577 data => WF_AUTOCANCEL,
2578 cb => sub {
2579 if ($Coro::current != $Coro::main) {
2580 Carp::cluck "major BUG: server tick called outside of main coro, skipping it"
2581 unless ++$bug_warning > 10;
2582 return;
2583 }
2584
2585 $NOW = Event::time;
2586
2587 cf::server_tick; # one server iteration
2588 $RUNTIME += $TICK;
2589 $NEXT_TICK += $TICK;
2590
2591 if ($NOW >= $NEXT_RUNTIME_WRITE) {
2592 $NEXT_RUNTIME_WRITE = $NOW + 10;
2593 Coro::async_pool {
2594 write_runtime
2595 or warn "ERROR: unable to write runtime file: $!";
2596 };
2597 }
2598
2599 $WAIT_FOR_TICK->broadcast;
2600 $WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited;
2601
2602# my $AFTER = Event::time;
2603# warn $AFTER - $NOW;#d#
2604
2605 # if we are delayed by four ticks or more, skip them all
2606 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
2607
2608 $TICK_WATCHER->at ($NEXT_TICK);
2609 $TICK_WATCHER->start;
2610 },
2611);
2612
2613{
2614 BDB::max_poll_time $TICK * 0.1;
2615 $BDB_POLL_WATCHER = Event->io (
2616 reentrant => 0,
2617 fd => BDB::poll_fileno,
2618 poll => 'r',
2619 prio => 0,
2620 data => WF_AUTOCANCEL,
2621 cb => \&BDB::poll_cb,
2622 );
2623 BDB::min_parallel 8;
2624
2625 BDB::set_sync_prepare {
2626 my $status;
2627 my $current = $Coro::current;
2628 (
2629 sub {
2630 $status = $!;
2631 $current->ready; undef $current;
2632 },
2633 sub {
2634 Coro::schedule while defined $current;
2635 $! = $status;
2636 },
2637 )
2638 };
2639
2640 unless ($DB_ENV) {
2641 $DB_ENV = BDB::db_env_create;
2642
2643 cf::sync_job {
2644 eval {
2645 BDB::db_env_open
2646 $DB_ENV,
2647 $BDB_ENV_DIR,
2648 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
2649 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
2650 0666;
2651
2652 cf::cleanup "db_env_open($BDB_ENV_DIR): $!" if $!;
2653
2654 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
2655 $DB_ENV->set_lk_detect;
2656 };
2657
2658 cf::cleanup "db_env_open(db): $@" if $@;
2659 };
2660 }
2661}
2662
2663{
2664 IO::AIO::min_parallel 8;
2665
2666 undef $Coro::AIO::WATCHER;
2667 IO::AIO::max_poll_time $TICK * 0.1;
2668 $AIO_POLL_WATCHER = Event->io (
2669 reentrant => 0,
2670 data => WF_AUTOCANCEL,
2671 fd => IO::AIO::poll_fileno,
2672 poll => 'r',
2673 prio => 6,
2674 cb => \&IO::AIO::poll_cb,
2675 );
2676}
2677
2678END { cf::emergency_save }
180 2679
1811 26801
182 2681

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